Indium Tin Oxide Nano-particle Surface Modification Of The Suspension Preparation

Nanoparticles Indium tin oxide [In2O3 (SnO2)] that is an N type semiconductor is an anti-static, radiation protection and anti-glare hotspot material in the electronic industry because of good electroconductibility and optical transmittance. ITO films are synthetized by vaccum sputtering. However the traditionally method is complex equitment, too many procedures and high cost. And ITO suspension is a new method that is for the future printed circuit and conductive films. Now it is an important that the dispersibility of ITO suspension in the application of nanosized-ITO powders.The paper had a general introduction in modifical mechaniam. Physical and chemical modifications were used to modify the nanosized indium-tin-oxide in the experience. And the effects of improvement the stability of nano-ITO suspention that used different of surfactants were studied including anionic surfactants, cationic surfactants, non-ionic surfactants, high polymer surfactants and silicon surfactants. The microstructural changes were analysed after surface modification by means of infrafed spectra, X-ray photoelectron spectroscopy, transmission electron microscope and dispersity tests. The paper introduced the effect of various surfactants addition on the dispersion property of nanometer ITO powders, and the 3%-4% is best. Experience conditions were tested and the ITO suspension was stable on the optimum conditions of the mearsurement.The optical property and electrical property of ITO films were tested. The optical transmittance of surface modification ITO films is no changes, but the electronic conduction is augmented. The results showed that PVP is the best surfactant that is not only improved the dispersibility of suspension but also not affected the conduction of ITO films.